Texas panhandle to the south. It is represented by Frank Lucas, a Republican. Oklahoma's 4th congressional district covers south-central Oklahoma and borders Texas along the Red River to the south. It is represented by Tom Cole, a Republican. Oklahoma's 5th congressional district, centered in Oklahoma City, covers central Oklahoma and borders all of the other congressional districts except District 1. It is represented by Stephanie Bice, a Republican. Oklahoma is part of the United States District Court for the Northern District of Oklahoma, the United States District Court for the Western District of Oklahoma, and the United States District Court for the Eastern District of Oklahoma in the federal judiciary. The district's cases are appealed to the Denver-based United States Court of Appeals for the Tenth Circuit. See also Oklahoma Democratic Party Oklahoma Republican Party Green Party of Oklahoma Oklahoma Libertarian Party Pirate Party of Oklahoma Socialist Party of Oklahoma Political party strength in Oklahoma Governor of Oklahoma Oklahoma Legislature United States congressional delegations from Oklahoma List of United States senators from Oklahoma Oklahoma's congressional districts List of politics by U.S. state Split-ticket voting Party switching in the United States Notes References External links Brief on Oklahoma politics. Oklahoma Political Science Association Homepage. Oklahoma's two U.S. Senators Oklahoma Democratic Party Oklahoma Republican Party Republican State Senator Nancy Riley switches parties from Republican to Democrat Lawton Politics simple:Oklahoma#Politics